northrop



, LOOM.

(Application filed Oct. 17, less.

2 Sheets-Sheet I.

(No Model.)

N0. 626,I88. Patented May 30, I899.

J. H. NDRTHBOP.

LOOIH.

(Application filed Oct. 17, 1898. (N9 Model.) 2 sheetssheat 2.

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U ITED TATES JAMES H. NORTIIROP OF HOPEDALE, MASSACHUSETTS, ASSIGNOR TOTHE DRAPER COMPANY, OF, SAME PLACE AND PORTLAND, MAINE.

LOOM.

SPECIFICATION forming part of Letters Patent No. 626,188, dated May 30,1899.

Application filed (lctober 17, 1898. Serial No. 693,718. (No model.)

To all whom, it may concern.-

Be it known that I, J AMES H; NORTHROP, of IIopedale, count-y ofWorcester, State of Massachusetts, have invented an Improvement inLooms, of which the following description, in connection with theaccompanying drawings, is a specification, like letters on the drawingsrepresenting like parts.

It sometimes happens that the yarn wound to on the warp-beam of a loomgets crossed owing to poor slashing or errors in drawing in, so that afew of the threads do not travel in a straight line from the beam to theheddles, and when a Warp stop-motion is used one of these crossedthreads is apt to pull its cooperating detector sidewise and causetrouble. This is particularly true when the detectors are located nearthe warp-beam, as in United States Patent No. 540,596, dated June4,1895;

and my present invention has for its object the production of simple andeffective means for overcoming the difficulty hereinbefore referred to.

Figure 1 is a sectional detail of a portion of a loom provided with awarp stop-motion of the character shown in the United States patentreferred to with one embodiment of my invention applied to the loom.Fig. 2 is a partial rear elevation of the loom shown in 0 Fig. 1, andFig. 3 is an enlarged perspective detail of another form of guide for acrossed warp.

The loom-frame A, whip-roll A the warpbeam WV, the warp-roll a, and theseries of 3 5 detectors or drop-plates b b, located between thewarp-roll and whip-roll, may be and are all as in said patent, to whichreference may be had, unbroken and properly taut warpthreads maintainingthe detectors elevated above the path of a vibrator d stoppage of thelatter by engagement with a dropped detector acting through suitablemechanism to stop the loom. The detectors or drop-plates are arranged inseries across the loom, and

the warp-threads pass from the beamW over the roll a and through eyes inthe detectors and thence to the harnesses.

Viewing Fig. 2, it will be obvious that so long as the threads lead offfrom the warp- 5 o beam in substantially the same vertical planes withtheir detectors there will be no tendency to draw the latter sidewise orout of place; but if a crossed thread, as w, is found which does notlead in proper manner to its detector it will tend to pull thesaid'detector sidewise, crowding it and its fellows out ofnormal'position and interfering very materially with their properoperation. In order to obviate this trouble, I mount on the loom-frame aguide-bar g, preferably below and back of the warp-beam, said barhaving, as shown in Fig. 2, a number of transverse holes g therein,nearits upper edge, and communicating therewith entrance-slots 9 whichintersect the holes substantially non-radially. Supposing now that thecrossed thread to is found, leaving the beam at the point 3, somedistance laterally from the vertical plane of its detecter b the threadis drawn down to that one of the guide-eyes 9 most nearly directly belowthe detector and inserted therein through its entrance-slot g so thatthe thread travels in the dotted line w directly from the guide to thedetector, it being immaterial that the thread passes at an angle fromthe beam to the guide-eye. If the thread is too taut to be drawn intothe guide-eye as described, it can be broken and pieced out for thepurpose.

It is only necessary to have a few of the guide-eyes, as the crossedthreads on a beam are not numerous and an eye nearly below the detectoris sufficient for the purposes of my invention.

The small shoulder formed by the non-radial intersection of theentrance-slot and the eye serves to retain the thread in the latter.

Instead of the slotted eyes shown in Fig. 2 the guide -bar g Fig. 3, mayhave guide notches or recesses 9 formed in its lower edge, and thethread is broken, carried around 9 the guide in the proper notch, andpieced up.

While I have shown one form of stop-motion mechanism for the purpose ofillustrating my invention, it will be obvious that my invention is notrestricted to use with such form, as the change of direction of thethread is equally well provided for even if the detectors are notlocated as herein shown.

Having fully described my invention, what I claim, and desire to secureby Letters Pat- 1 ent, is

1. In a loom, the warp-beam, a series of warp-stop-motion detectorsthrough which the warp-threads pass, and a guide located between thewarp-beam and the detectors and out of the path of movement of normalwarpthreads, to positively engage and change the path of a crossedthread as it leaves the beam and lead it to its detector substantiallyin the vertical plane of the latter.

2. In a loom, the warp-beam, a series of warp stop-motion detectorsthrough which the warp-threads pass and a guide member located betweenthe warp-beam and detectors out of the path of properly woundwarpthreads,and provided with a number of transverse guide-recesses, anyone of said recesses being adapted to receive a crossed thread from thebeam and change its path to lead it to its detector substantially in'thevertical plane of the latter.

3. In a loom, the warp-beam, a series of warp detectors through whichthe warpthreads pass, and a transverse bar located between the beam anddetectors, provided with a numberof guide-eyes near its upper edge, eachhaving an open entrance-slot, whereby a crossed thread leading from thebeam may be carried through that guide-eye most nearly in the verticalplane of the detector cooperating with such thread to bring suchmisplaced or crossed thread into or closely adjacent the path which itwould traverse if properly placed on the beam.

In testimony whereof I have signed my name to this specification in thepresence 0 two subscribing witnesses.

JAMES H. NORTHROP.

\Vitnesses:

GEO. OTIS DRAPER, ALBERT H. CoUsINs.

